Pressure valve



J. BARTON.-

PRESSUBE VALVE. APPLICATION FILED IUNEZ, I919.

Patented Apr. 25, 1,922.

III/III] 8 mmntoz J W @arfoy,

* UNITED s'rrs f A NTI v PRESSURE VALVE.

l Application filed June 2,

T all whom it may concern Beit known that I, JOHN W. BARTON, a

citizen ofthe'United States of America, re-

siding at Flint, in the county of Genesee and State of Michigan, have invented certaln new .and useful Improvements in Pressure Valves, of which the following is a-specifi cation, reference being had therein to the accompanying drawings.

i This invention relates to improvements in valves adapted to control a passagewayv and 1; wherein the position of the closure relative.

' mally active in such control.

to'its seat is controlledby fiuid pressure nor- The invention is designed more particularly for use in connection with systems wherein a pressurev eonditionis set up be-' yond the closurein the presence of a supply through the passageway, this pressure being made effective on the closure in such manner as to vary the posltion'of theclosure-relatwe to its seat; and" this variation in pressure may be provided by variations in tempera-v ture' conditions within the pressure-produc-:- ing portion of the'system. One embodiment of use of the valve herein disclosed, is to be found in its'installation as thecontrolling device for vulcanizingjmoulds and plates or boilers, a use to which the invention is es, pecially applicable. I For instance, vulcanizers for molding and curing tires are generally in the form of casings for containing'water, the casing having faces of. molding characteristics, the ater compartment havlng the characteristics of a; steam generator or boiler, steam generation being provided byv the use of a suitable fluid or gas in a suitable burner. It is desirable" that the temperature of the molds be.maintainedlasuniform as possible, and this can be controlledby regulatinguthe steam pressure by regulating the burnerflame through controlling the supply of fuel. For this purpose the present invention is particularly applicable, owing to the fact that the closure operating means is placedfunder the control of the steam, pressure, the closure itself; operating to control the passageway for the fuel.

Obviously, control of'this kind needs to. be sensitive in character, since smallvar atlons in pressure may represent considerable variation in temperature conditions, thus tend 1919; semlzno.301,1-751 ing to affect the character of theiwork being i done by the apparatus-1' Another feature of the inventionis to ro. vlde a construction which will, in the presence of an accident in the controlling means, operate to automatically seat the closure and thus avoidfdifficultyinthe apparatus.

Theinvention consists in the matters here cularly inafter .set forth, and more] p'arti POlIltGCl" out in "the appended claims;

The dravving-is-a view inlongitudinal sec-' 1 tion, partially brokenaway and in elevation, of a valve that embodies features of the invention. I Asherein shown in a preferred, form, a casingl has an intake nipple 2 and an'outlet boss 3 separatedbya wall 4: in which a valveseat bushing 5 is screW-threadedor otherwise axially adjusted meanszof a manually 0perable'stemfi connected thereto andarranged with a-suitable packing gland 7 to avoid" y leakage; Thisprovides the fuel orfiuidpassageway. which, Whenused for the abovedescrib'ed, leads to the. burner. I

A bonnet 8 is screw-threaded onto the-ass:

ing in substantially axial alignment with-the sleeve 5. Agfclosure 9'for theseat on :the'

bushing 5 is. retracted normally therefrom purpose l by ahelical spring 10,;thatxissecuredtof threaded ring 11, insertedfinthe up'per portion of thea'zbonnet. -A cap 12 on the lower end of the spring is cemented or joine'd to the closure 9 by Wax or other material,indicated' at 13,'which 'softens'under heatfr.

r A chamberis formed within the spring'lfi by a sack 14 of extensible fabric, such as rub her or the like, the uppermargin of which is clamped betweenthe ring-'11 and a nipple 15 screwed'into the bonnet 8, which is likewise' a connection whereby communicationmay be established between the interior y-ofthesack 14 and the pressurefproducinginstrumentality'the steam-space in the particularem; bodiment referred to, thus providing an open communication Withsuchspae. I v

An adjustable plug 16may regulate flow through a by..-pass;1 7,='in the closure, so that,

regardless --.of the] position oftheaclosure," there may be always a 'regulatable,minimumv flow through. the valve.

. Normal y: sack. 1 1 Will be filled watef of condensation (the sack providingja closed 6O having characteristics of an indirect thermoend to the line of communication with the steam space), thus retaimng the sack free I from steam temperature, the Contents, hw-

ever,being subjectto the steam pressure of the generator or boiler.

In operation, the spring normally retains'the closure in its open'posltlomand until the power of the spring is overcome,

' the closure will remain in this position. The

changeis provided by the value of the pressure placed on the'sack 14; or its contents."

Increase in pressure within the generator- 01" boiler increases pressure 'on the sack or 1ts content, and since the latter practically fills the interior ofthe spring 10, the effect of the pressure increase isto elongate the sack, thus moving the closure toward its seat and reduce the fuelamouht passing through the fuel passageway, cutting down the flame and aflecting the steam generating ability to decrease the pressure. This action takes place whenever the pressure increases beyond the desired maximunn'the maximum being set by the position of nipple 1 5 in barrel 8, adjustment of ,the'nipple permitting variation in the distance between the closure and its seat to control the maximum amount of ,fuel which passes through the fuel passageway.

Should conditions arise which would disrupt the sack 14, the steam pressure would drive out the content of the sack and permit the steam to enter the sack and discharge duced, and this result is obtained by a structure sufiiciently sensitive to maintain the va-' riations in pressure comparatively small. This sensitiveness is obtainable by the use of thesack 14 which is subject to small variations and which, by its mountingtranslates these variations into linear movement'applied directly to the closure itself.

Obviously,'the invention is not limited to its use with the specific embodiment referred to, that being more or less illustrative of the installation of the valve for use as a controlling medium in other relatlons.

It will be understood, of course, that thevalve herein disclosedmay be considered as I static action, in that thepressure effective in the expansion of the sack 14 is controlled by theheat value effective in setting up the cond -trons of pressure, the heat value being c0ntrolled by the amount of fluid passing through the valve to the burners. It will be understood, however, that the mere presence of heat within the sack will not set the sack into motionto obtain the desired sensitiveness, the actionbeing by pressure rather than by the presence of heat in the sack 1tself. HObviously changes in the detail of con struction may be made without departing from the spirit of the invention, and I do not care to lim it myself to any particular. form or arrangement of parts.

Vhat I claim is; V p 1. In a valve, a seat, ashiftable closure therefor, means normallyoperative to yield ably retract the closure from the seat, and a. chambereforming element housed by said means and normally free from operative connection with the passageway controlled by the closure, said element being adapted to be connected to a source of and expanded by internal fluid and arranged to, force. the

closure. to seat in opposition tothe yieldably retracting means. Y

2.. In a valve, a seat, a 'shiftable closure therefon means adapted to yield-ingly retract the closurefrom the seat, 'andan ex- 1 tensible chamber housed by the retracting means and adapted to seat :the closure against the influence of the retracting means when extended by internal pressure of fluid. In a valve,"a seat, a closure therefor,

yieldable means adapted to retract the closure fromthe seat normally, an extensible chamber adapted tofforce the closure to seat under the influence of pressure, and a con nectlng medium between the closure and retractlng means adapted to release the 1010- sure to seat itself'whendisruption' oflthe chamber exposes the --mediu1n to heat above against the action .fof the yieldablemeans the normal temperature under which the i valve is arranged to operate, 7 4. In a valve,a seat," a shiftable closure therefor,- a spring adapted to retract the closurefrom the seatnormally, and an'extensible chamber within the spring adapted to force the closure toseat against the spring action under the influenc'e of internal fluid pressure. I V g 5. In a valve, a seat, a closure therefor, a

spring adapted to' retract the closure from, the seat normally, an extensible chamber adapted to seat the closure against the action of the spring under i the influence. offluid under pressure, and means connecting the closure to the spring adapted torelease the closure to seat itself when disruption of the chamber exposes such means to a, tem

perature above the normal. v

6. In a valve, a casing having an;

v inlet and outlet separated bywan in'ternal wall,

an apertured "valve seatfadju'stably secured in the wall, 'a shiftable closure for the seat, 136' a spring mounted in the casing and adapted to retract the closure from the seat normally, and an extensible chamber in the" casing housed by the spring and adapted to force the closure to seat against the action of the spring when under a predetermined fluid pressure in the chamber.

7 In a valve adapted to control a passageway from a pressure-production source, a closure seat within the passageway, a shiftable closure therefor, means for yieldingly'retaining the closure in an open position, and means housed by and separable from said retaining means and responsive to pressure variations for varying the position of the closure relative to itsseat, said latfir means including an expansible bag-like e ement mounted to have its interior in open communication with the pressure-production source.

8. Ar valve as 1n claim 7 characterlz'ed in that the bag like element is mounted to i substantially limit its maximum expansion to the direction of closure movement.

9. A valve as in claim 7 characterized in that the bag-like element is housed bygthe closure retaining means in 'a manner to substantially limit the element maximum expansion to the direction of closure move-r I a ment. I p

10. A valve comprising a body providing a valve chamber, a valve seat in said chamber, a valve element, a contractible coil and longitudinally with the spring to trans-v late the valve element. 7

In testimony whereof I afiix my signaf ture in the presence. of two witnesses. Y JOHN W. BARTON; Witnesses: f I CHARLES H. 'SLATING,

DON D. WATTERS.. 

